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-J M .WOLBREGHT 8S-heetSheet 1. Instrument for Transmitting Diagrams.

No. 201,473. -Patented-March l9,1878

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ATTOR N EV @QWM new i m 1 8 Sheets--Sheet 2. J. M. WOLBREOHT. Instrumentfor Transmitting Diagrams.

No. 201,473. Patented March 19,1878.

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. J. M.;WOLBREGHT. Instrument for Trflansmitt ing Diagrams.

No. 201,473. Patented March 19, 1878;

, lNVEN TOR m ,w 00 m N-PETERS. PHOTCLUTHOGRAPBER, WASHINGTON. D. C.

UNITED I STATES PATENT OFFI E;

JOHN. M. WOLBREOHT, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR "TOJOHN SHERMAN AND'WILLIAM T. HOTOHKISS, OF SAME PLACE IMPROVEMENT ININSTRUMENTS FOR TRANSMITTING DIAGRAMS.

Specification forming part of Letters Patent No. 201,473, dated March19, 1878; application filed I October 13,1877.

'to the accompanying drawings, which'form part of this specification.

My invention relates to an improved system and instrument for copyingand transmitting diagrams. I a

Heretofore it has been practically impossi-' ble to'transmit accurateangles and measurements of diagrams by telegraph; and the ob ject of myinvention is to provide a system and instruments whereby the severalanglesof the most complex diagrams can bereadily and accurately copiedin a form to admit of transmission by telegraph. I

In the accompanying drawings, Figure 1 2 represents a plan view of myimproved instrument for calculating the measurements of the angles of adiagram. Fig. 2 is a vertical section taken through one of the graduatedbars.

Fig. 3 illustrates a diagram wherein the sev eral angles are designatedby the proper combination of figures, which, when forwarded ingroups-by-telegraph to any distant station,

enable the correspondentat the reoeiving-station to readily ascertainthe exact angles of the diagram by adjusting his instrument accordingtothe figures of the telegram received, and thus enable him to reproducean accurate fac-simile of the diagram at-the sending-station. Fig. 4represents a similar diagram, wherein the angles are representedbyletters, which may be arranged in words to constitute a cipher messagefor transmitting the desired information. Fig. 5 is a modification.

A represents .a bed-plate, which may be constructed of anydesiredinaterial. In the present example, the bed-plate A is provided ateither end with vertical pins or posts a a, to which are pivoted thegraduatedbars B B, the same being removably secured to said posts bymeans of locking-pins b b. The outer ends I of the graduated bars B Bare supported by loosely-pivoted legs 0 that the bars may be readilymoved inany direction without danger of. tearing or otherwise injuringthe diagram on which it is placed. i i It is'evident that light castersmaybe employed in lieu of the legs or supports b, and equally goodresults secured thereby.

Each graduated baris formed with a central' slot, 0, extending nearlythe entire length iof the bar, which divides each bar into two sections,0 0'. Each section 0 0 is provided 'with a graduated scale, denotinginches and tenths of inches.

One of the sections of each bar-as, for instance, section chasthe inchesdenoted by figures running from 1 to 10, and each inch is subdividedinto tenths. The opposite sec- ;t-ions c of each bar are likewisesubdivided into inches and tenths, each half-inch being designated byletters, consonants being preferably used, while the fractional parts ofeach half-inch are designated by the five vowels.

Upon each of the graduated bars B 18 are placed the verniers D D, thesame being ar-f ranged to slide freely 'on the bars 18 B": ;Through theends of the vernier-s D D ex-' tends a pencil-holder or indicator, E,the point diagram by a series of dots, which designate the angle of thediagram.

My improved system and instrument for transmitting diagrams will bemoreclearly understood by referring to Fig. 3. Assuming that it is desiredto transmit by telegraph to a distant station a facsimile of the d agramrepresented inFig. 3,-the sender places an instrument similar to the oneillustrated in Figs. 1 and 2 over the diagram, and "moves theindicator-or pencil to the point designated by the letter a. The vernieron the leftrhand graduated bar indicates a measurement of I hand barWlll register 305, while the righthand bar will register 426.

Proceeding in this manner along the entire outline of the diagram, andproperly indicating every angle therein by the proper figures on thegraduated bars and verniers, it will enable the several angles to beforwarded to a distant station by means of a message made up of thedifferent groups of figures designating the various angles of thediagram.

Atthe receiving-station the receiver of the message places an exactduplicate of the instrument employed by the sender on a sheet of paper,and adjusts the graduated bars until the slide or Vernier of the leftand right hand graduated bars respectively register 475, 144, and thepencil is then depressed to form a dot at that point. Then the pencil ismoved until the verniers register 305, 426, and the paper is againmarked by the pencil. In the same manner the several angles of thediagrams are soon determined. By connecting the several dots formed bythe indicator there will be reproduced a fac-simile of the diagram inthe hands of the sender.

Instead of employing figures to transmit the message, cipher telegramsmay be used with equally accurate results. As heretofore stated, eachhalf-inch on both graduated bars is represented I by a consonant, whilethe fifths of each half-inch are represented by the five vowels.Referring to Fig. 4, when the indicator is placed on the point 3 thevernier on the lefthand bar will be located a little below the letter J,which letter will stand for the first letter of the word. The fifths arethen counted from the letter J in the order of the five vowels, and itis found that the fraction of theone-tenth is to be denoted in themessage, it

is designated by a word of two syllables-as, forinstan ce, theVernier-register Pa, and also a fraction of an inch less than one-tenth.In such case the word is formed of two syllables, as Panting, or thesame result can be obtained if, instead of having the slotted bars B Bgraduated to measure the distances to the point, arcs are graduated andattached to Y the instrument for the purpose of measuring the angles insimilar characters, as shown in Fig. 5; or one graduated bar and onegradu-- ated arc may be used-in fact, any arrange ment for measuring theco-ordinates of points and designating them by groups of figures orletters.

From the foregoing it will be understood that a concise and accuratedescription of the entire contour of a diagram maybe condensed into atelegram made up either of figures or words, and the same, when receivedat the receiving-station, may be readily portrayed by the employment ofan instrument in duplicate of the one used by the sender.

It is evident that the instrument may be.

greatly varied in the details of its construction and arrangement ofparts without departing from the spirit of our invention; also, anydesired system of designating the different angles of a diagram may beemployed, as I donot confine myself to the exact formula herein setforth.

My improvement is adapted for the purpose of forwarding by telegraph acomplete outline of any desired diagram that is desired to be quicklyforwarded from one point to another distant point. 1

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l; The method, substantially as hereinbefore set forth, of copying andtransmitting diagrams, the same consisting, essentially, in designatingthe several angles of the diagram by the words or figures indicated on ameasuring instrument, and then transmitting this transcript, made up ofas many groups of such figures or words as there are angles to betransmitted, and translating the message at the receiving-station bymeans of an instrument in duplicate of the one employed by the sender,substantially as set forth.

2'. The combination, with a bed-plate, of the intersecting graduatedbars, the intersecting verniers, and the indicator located at the pointof intersection of the graduated bars, substantially as set forth.

3. The combination, with the bed-plate and intersecting graduated barspivoted thereto, of the verniers and the indicator upheld by a spring,substantially as set forth.

4. The combination, with a bed-plate, of the intersecting graduated barspivoted thereto, and movable supports attached to the free ends of saidgraduated bars, substantially as 'set forth.

In testimony that I claim the foregoing I have hereunto set my hand this9th day of October, 1877.

Witnesses:

ROBERT D. MESTON, W. T. HorcHKrss.

JOHN M. WOLBREOHT.

